It's probably too early to tell how many 210's will need evaporators. Some 140s need them, but certainly not all 140s will need one.

Of course check carefully for rust. Remember the spring perches.

Also note that your '96 has a very well proven mechanical transmission, whereas the 2000 is the (then three-year old) electronically-controlled version. Problems get even more expensive. And don't even think about spilling anything on the shifter opening.

As for the engines, I have no clue.